Bushed combination casing-wrench.



W, L. DUNN. y 1 -BUSHED'GOMBINATION GASING WRENCH.

Alfqltented- Aug. 23, 1910.

APPLIOAHON FILED JUNE '1910.'

"Soviel ilninfoerh roos *Wil mirri' il' Apnlicsiiion-ieii Enne Gi,

To villiers/i conneries y Be it lmown snes Winners germ, s citizen ori the Umsel Stai/es, resioling el;

Piron-m vfoe county oi Veneers sind Sieve of .empliiiecl in Poient Number 883,630 cieieci Merch 35i, i208.. enri oppliceiion for peinent, sied oei. isos, snol so issnerl Mey if?, 1916, No. 958,693.

@kiwis of invention er :ff-ifo strenglien'end lighten the wrench snol no ociiiveie ilie ciieiiging of che bushings; to

, 'nroviale o. hushed Wrench which is not lie- `le to' lieconee issiiied from. loeingg7 beni out of sloerie' byover serein sofi slsc Lc revoici the necessity ci? .eccorere workmanship in constructing tire wrenches; vincolto provide e form busliin which een be conven ienly constriiereci of 'vsrions 'thicknesses with compororively slight increase in weicht es the siiiclrness increases.

'iie Abodies end bushings of these Wrenches are cssihend in making the cest- Vings they eige lielile to worp upon oooiing' of the Wrench or the.

and when ehebod bushing, or both, o Wsrpii becomes cliiii cuil; or impossible to epply the "bushing vo the wrench. By this invention the diilicuity thus cnco'oniereol is overcome end che rougir cest bushings and the wrench bodies ere solo iecl for immedieie use Without roiicliine avori` for the purpose of liieing the 'bushings io the body.

The, accompanying drawings illosireiie the inveniaion.

`Figure i is e'gicrspmtive View of the einen Wrench encl two seis of intercliongeoliie blislmigsdereclied. @5%.2 iso plan of rire Wrenchl Withinl s ses of iuslimgs #herein in use on s. casing. @ne of bushings sind e portion of one of ilfe'segrnentol Wrench members are shown'in secrion ond only o fragment of the Wrench lever or' iisnrlle is shown. Fig. 3' is e cross section on one zr, Fig. 2 of oney nieniiaer of the wrench with e bushing of one thickness therein. Fig. i is ai sectional vierir on line indicste'ri by Fig. 2, but showing e dierent; thickness of cushing. Fig. 5 1s en elevation ,projected from Fig. 2 omitting the lever sind einem. Fig. 6

n. rrsingxcnnrronigrs..

.i is en inside eleveftion oi one of rire biisii and each moy be u'sed in any o the grippinlmenibers.

rlne concave gripping members i, 2, 3 are pivoieol iogogher. by pivots Il end o to form en open bend io'encircle o. casing, and a si'eel roller 6 is pivoterl et its exis by :iy pin 7, to the loose enel oi the termiriel member 3. The lever' 8 is pivored by a. pin 9 to the gripping rnemberi and is provided with o oroicli 10 izo engage the roller@ thus to connect the enls oi' the 'encircling bend, sind to enable the bend to ice revolved around the axis oif'tlie casing in the Work of screwing and unscrevving ilie casing., retainer 1l is on the intermediate gripping member 2, and the connection l2 which is si chain fastened to the lever 8, is adapted to engage the retainer to provide 11i-loose stoy to prevent the roller from becoming disengaged from the crotch.

seme es the construction shown in my former application; but the gripping merribers l, 2, 3 ere of .sin improveii construction each lia-ving knuckles ai iis ends ond being provided et the crown. oi iis srch between its knuckles with s performed cross bei: 13 having on vine inner foce thereof s, smiiet 14 to sont o performed in., .i5 the@ ,projects fromilie exierior fece o erich biisliinff i6, end erich gripping member is provi Aed. betweenA its cross bei' enel the ends of the gripping' mero loer-.Wish slots; iie gripping member i liev-l ing open slot l5?) ino receive 'ine flover 8 enel en open siot 20' so receive the knuckle 2i ofthe intermedie@ gripping; ineiriber 2,- rvliicli nos two slots 22 between its lier li snol its knuckles 2i, 23; the rerrninsl grip going member 3 being provided with two Esch of rlie members l., 2 ond 3 is prrr ond all the bushings are inierchangealiilev openy slots 24e, one of which receives the vide exterieur@7 with Ysrengtliening ribs.'

eriprms The foregoing construction is much the The member' 2 being providedwith two strengthening ribs 25 and the members l and 3 being each provided with two inner strengthening lribs 26and two outer strengthening ribs 27. Said strengthening ribs extend from knuckle to knuckle of the gripping members respectively and merge into said knuckles as clearly seen in Figs. 2 and 5. '.lhe inner faces 2S, 29 and 30 of tht` lugs and the sockets 14 are preferably tapered to lit each other; the lug engaging the wall of the sockets when the outer face of the bushing engages the inner face of the Uripping member to which it is applied. aid outer faces are variously constructed in the bushings of the different sets. In the set comprising the bushing shown in Fig. 7 the outer face 37 extends in straight traces across the bushing. In Figs. 3, 4, 8, 9 and 10 the outer faces are provided with ribs 38, 39 and 40, respectively, thus giving additional thickness to the bushings and' contracting the bore of the elosedwreneh in accordance with the .set of bushings applied thereto. In the drawings the nuts 33 are shown provided with washers 41 to engage the outside of the gripping members, thus allowing the bodies of the nuts 33 to be of medium size for maximum openings formed by the sockets 14. The relative dimensions of the lugs 15, and sockets 14 is such that clearance is allowed between the tip of th lugs and theoutside of the gripping members when the lugs are seate In practical use when drilling a well the band formed of the gripping members with" out the bushings will be bent around the largest sized'casing to turn the same as it is desuedto screw the sections together, and the roller 6 will be brought into the crotch of the lever 10 and'the connection will be caughtin the forked retainer 11 allowing such slack as may be requisite for the operation of the wrench. When the free endof the lever is swung toward the terminal gripping member 3, the lever acting on the pin 9 and the roller 6 tightens the band to turn the casing ees/i511 42. On the reverse movement, the oonneotion 12 causes the band to slip back around the casing without becomingdetached from the lever. When the larger casing is finally completed and the last section screwed home, and it becomes necessary to insert the next smaller size casing into the well the first set of bushings shown in Fig. 7 will be applied, a bushing to each of the gripping members; and the bushings will be fastened. in place by the bolts and nuts as shown in Figs. `J 2, 3, and 4, and. then the wrench will be used as required on the smaller casing; and so at each reduction in the size of casing the bushings previously used will be removed and a new set of bushings for the next size of casing will be applied in the same manner as before; and so on until the bushings hav' ing the yleast radius and the deepest ribs have been used'.

I claiinv 1. A wrench comprising segmental members pivoted together to form an open band,v means to connect the ends of the bands together and to revolve the same to turn the casing, said'members being provided with. 85

sockets; bushings provided with lugs to en ter said sockets, bolts extending through said lugs and sockets, and nuts for said bolts to hold the lugs in the sockets.

2. In a wrench the combination with a 9.0

segmental gripping member provided with a perforated cross-bar and having a socket in said cross-bar, ol: a bushing provided with 'a luff to enter said socket a bolt seated in the Ing and extending through the socket, and'anut on said bolt to secure the bushing and gripping member together. l

`3. In a wrench, segmental gripping menibers provided with knuckles and pivoted together and each provided with a cross-bar, and with slots between the cross-bar and the knuckles and with ribs on the exterior face extending between the knuckles.

4. In a Wrench a segmental gripping member provided with ribs extending be 105 tween the ends of the member, a bushing to lit the inner face of said memberand provided with ribs extending between its ends to engage the inner face of the member, and means to fasten the bushing and member together. l

In testimony whereof, I have hereunto set my hand at liru, California this 28th day of Muy i910. i WILLIAM Ii. DUNN.

In presence of- Giio. C. Iloiims'rnn, CLA RA J'. FnLsnN 'ri m r.. 

